It happened several times last year, but now, I don't think it is possible anymore. Ethereum's 300 USD price is not that high, it is still very low price. So, 100 USD is not possible for sure.
I do not want to sound like a pessimist but it can happen anytime with any cryptocurrency. Crypto is volatile, and Ethereum is flexible also. However, in the nearest time, ETH is going to gain a lot. I am sure it can hit 500 USD.